feat: 数据库优化功能

Author: CodeJudge

backend/src/controllers/problemController.js

@@ -1,4 +1,4 @@
-const { queryAll, queryOne, run } = require('../config/db');
+const { queryAll, queryOne, run, getSafeDb, saveDb } = require('../config/db');
 
 function listProblems(req, res) {
   const { type, difficulty, search, page = 1, limit = 20, sort } = req.query;
@@ -129,6 +129,14 @@ function getAdminStats(req, res) {
   });
 }
 
+function optimizeDatabase(req, res) {
+  const db = getSafeDb();
+  db.run('ANALYZE');
+  db.run('VACUUM');
+  saveDb();
+  res.json({ message: '数据库优化完成' });
+}
+
 function getProblemStats(req, res) {
   const stats = queryOne(`
     SELECT
@@ -174,4 +182,4 @@ function importProblems(req, res) {
   res.json({ message: `成功导入 ${imported} 道题目`, count: imported });
 }
 
-module.exports = { listProblems, getProblem, createProblem, updateProblem, deleteProblem, getProblemStats, getAdminStats, getTagsCloud, exportProblems, importProblems };
+module.exports = { listProblems, getProblem, createProblem, updateProblem, deleteProblem, getProblemStats, getAdminStats, getTagsCloud, exportProblems, importProblems, optimizeDatabase };

backend/src/routes/problems.js

@@ -1,6 +1,6 @@
 const router = require('express').Router();
 const { queryOne } = require('../config/db');
-const { listProblems, getProblem, createProblem, updateProblem, deleteProblem, getProblemStats, getAdminStats, getTagsCloud, exportProblems, importProblems } = require('../controllers/problemController');
+const { listProblems, getProblem, createProblem, updateProblem, deleteProblem, getProblemStats, getAdminStats, getTagsCloud, exportProblems, importProblems, optimizeDatabase } = require('../controllers/problemController');
 const { getTemplate } = require('../services/judgeService');
 const { optionalAuth, adminOnly } = require('../middleware/auth');
 
@@ -44,6 +44,7 @@ router.get('/export', adminOnly, exportProblems);
 router.post('/import', adminOnly, importProblems);
 router.get('/:id', optionalAuth, getProblem);
 router.post('/', adminOnly, createProblem);
+router.post('/admin/optimize', adminOnly, optimizeDatabase);
 router.put('/:id', adminOnly, updateProblem);
 router.delete('/:id', adminOnly, deleteProblem);